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M2 Data transmission - Computer Science IGCSE

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M2 of computer science with data transmission igcse Based on textbook: Computer Science for Cambridge igcse and o level course book second edition

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Institution
Study
Course
School year
200

Document information

Uploaded on
October 2, 2025
Number of pages
18
Written in
2024/2025
Type
Class notes
Professor(s)
Oli howson
Contains
Data transmission

Subjects

Content preview

To Data Transmision.
Moduel w
21. - h
Te Structure f
o a data packet

to another

For hte data inofile ot eb transmited, it si brokendou
into packets.
•I a small unit of data
Packets have three sections:
- Packet header
- Payload
- Tr a i l e r


ains: →IP address of the device
header contaddress
1) Pack•etdestination
•packet number →
Each data packet ni hte
•Originators address Sile has a packet number
to recreate the file when
the
destination
reciered device has
(IP) Internet protocol address: it.
the unique address that is the IP address of the
given to a device when it
device stom which
is connected. t o a network
data has b the
Jent Fran en originaly

, 2) Payload - the actual data that the
user si sending ot hte reciever
3) Trailer - a section of a packet of data
that contains info about for any
v o r dete ctio n s u s t e m s u s e d and
h e marker to i n d i c a t e the end
of the packet
2.2 - Packet Switching
packet switching = a method of transmitting data
packets across a network.
Each data packet is able ot take
a n individual pathway across
the network


it is
being
network - computers and devices that are Joined
Sent together using cables or wireless ot technday
router - a network component that examines
a data packet ot obtain its destination
dataIt and
address then forward the
packet t o th is address

, Protocols are sets of rules and Standards
used in the creation of website


HTTP - og (Hypertext transfer protocol)
gorens communication between Web
Drowsers and servers
HTTPS (secure) - include secure encryption

CP Transmission Conrotl Pro
- manges the sending ao tcnold recieving
of all your d a t a a s packets
more routers = more reliable interne t

IP fInternet Protocol)
location of your device on internet
I addrs- hetps ni identiy the connection of anetue
VC
i address - ensures the computer" devices physical
ocation t h e actual device
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